For English speakers this sounds at best strange, at worst awfully pompous, yet this way of introducing yourself is pretty common in Germany and you’ll hear it all the time.

There are absolutely no hidden connotations when using the definite articles “der” or “die” in connection with introductions. They absolutely don’t need to be used but if you come across them don’t be surprised and if you feel like wanting to use them in your own speech: Be my guest.